20334431 has 16 divisors (see below), whose sum is σ = 23442048. Its totient is φ = 17472000.

The previous prime is 20334403. The next prime is 20334437. The reversal of 20334431 is 13443302.

It is not a de Polignac number, because 20334431 - 2⁶ = 20334367 is a prime.

It is a super-2 number, since 2×20334431² = 826978168187522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20334437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21866 + ... + 22776.

It is an arithmetic number, because the mean of its divisors is an integer number (1465128).

Almost surely, 2^20334431 is an apocalyptic number.

20334431 is a deficient number, since it is larger than the sum of its proper divisors (3107617).

20334431 is a wasteful number, since it uses less digits than its factorization.

20334431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 20334431 is about 4509.3714639626. The cubic root of 20334431 is about 272.9463817019.

Adding to 20334431 its reverse (13443302), we get a palindrome (33777733).

The spelling of 20334431 in words is "twenty million, three hundred thirty-four thousand, four hundred thirty-one".